Hi, have a question regarding some antifreeze systems i service. The systems were designed about 10 years ago and have appx. 560 gallons of Glycerin premix in them, and were installed with expansion piping instead of tanks. The worst of them has 3 10" pipes about 8' tall, which have been next to...
I have a question form a customer, a nursing home, on system design. In my experience, all heads which are on drops in a dry system need to be dry heads to prevent water from freezing in the drop because the drops will not drain through the main. The customer recently had a dry syst. installed...
